/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.je.bpm.engine.impl.cmd;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.je.bpm.core.model.BpmnModel;
import com.je.bpm.core.model.ValuedDataObject;
import com.je.bpm.core.model.process.SubProcess;
import com.je.bpm.engine.ActivitiIllegalArgumentException;
import com.je.bpm.engine.ActivitiObjectNotFoundException;
import com.je.bpm.engine.DynamicBpmnConstants;
import com.je.bpm.engine.impl.DataObjectImpl;
import com.je.bpm.engine.impl.context.Context;
import com.je.bpm.engine.impl.interceptor.Command;
import com.je.bpm.engine.impl.interceptor.CommandContext;
import com.je.bpm.engine.impl.persistence.entity.ExecutionEntity;
import com.je.bpm.engine.impl.persistence.entity.VariableInstance;
import com.je.bpm.engine.impl.util.ProcessDefinitionUtil;
import com.je.bpm.engine.runtime.DataObject;
import com.je.bpm.engine.runtime.Execution;

import java.io.Serializable;

public class GetDataObjectCmd implements Command<DataObject>, Serializable {

    private static final long serialVersionUID = 1L;
    protected String executionId;
    protected String dataObjectName;
    protected boolean isLocal;
    protected String locale;
    protected boolean withLocalizationFallback;

    public GetDataObjectCmd(String executionId, String dataObjectName, boolean isLocal) {
        this.executionId = executionId;
        this.dataObjectName = dataObjectName;
        this.isLocal = isLocal;
    }

    public GetDataObjectCmd(String executionId, String dataObjectName, boolean isLocal, String locale, boolean withLocalizationFallback) {
        this.executionId = executionId;
        this.dataObjectName = dataObjectName;
        this.isLocal = isLocal;
        this.locale = locale;
        this.withLocalizationFallback = withLocalizationFallback;
    }

    @Override
    public DataObject execute(CommandContext commandContext) {
        if (executionId == null) {
            throw new ActivitiIllegalArgumentException("executionId is null");
        }
        if (dataObjectName == null) {
            throw new ActivitiIllegalArgumentException("dataObjectName is null");
        }

        ExecutionEntity execution = commandContext.getExecutionEntityManager().findById(executionId);

        if (execution == null) {
            throw new ActivitiObjectNotFoundException("execution " + executionId + " doesn't exist", Execution.class);
        }

        DataObject dataObject = null;

        VariableInstance variableEntity = null;
        if (isLocal) {
            variableEntity = execution.getVariableInstanceLocal(dataObjectName, false);
        } else {
            variableEntity = execution.getVariableInstance(dataObjectName, false);
        }

        String localizedName = null;
        String localizedDescription = null;

        if (variableEntity != null) {
            ExecutionEntity executionEntity = commandContext.getExecutionEntityManager().findById(variableEntity.getExecutionId());
            while (!executionEntity.isScope()) {
                executionEntity = executionEntity.getParent();
            }

            BpmnModel bpmnModel = ProcessDefinitionUtil.getBpmnModel(executionEntity.getProcessDefinitionId());
            ValuedDataObject foundDataObject = null;
            if (executionEntity.getParentId() == null) {
                for (ValuedDataObject dataObjectDefinition : bpmnModel.getMainProcess().getDataObjects()) {
                    if (dataObjectDefinition.getName().equals(variableEntity.getName())) {
                        foundDataObject = dataObjectDefinition;
                        break;
                    }
                }

            } else {
                SubProcess subProcess = (SubProcess) bpmnModel.getFlowElement(execution.getActivityId());
                for (ValuedDataObject dataObjectDefinition : subProcess.getDataObjects()) {
                    if (dataObjectDefinition.getName().equals(variableEntity.getName())) {
                        foundDataObject = dataObjectDefinition;
                        break;
                    }
                }
            }

            if (locale != null && foundDataObject != null) {
                ObjectNode languageNode = Context.getLocalizationElementProperties(locale, foundDataObject.getId(),
                        execution.getProcessDefinitionId(), withLocalizationFallback);

                if (variableEntity != null && languageNode != null) {
                    JsonNode nameNode = languageNode.get(DynamicBpmnConstants.LOCALIZATION_NAME);
                    if (nameNode != null) {
                        localizedName = nameNode.asText();
                    }
                    JsonNode descriptionNode = languageNode.get(DynamicBpmnConstants.LOCALIZATION_DESCRIPTION);
                    if (descriptionNode != null) {
                        localizedDescription = descriptionNode.asText();
                    }
                }
            }

            if (foundDataObject != null) {
                dataObject = new DataObjectImpl(variableEntity.getName(), variableEntity.getValue(), foundDataObject.getDocumentation(),
                        foundDataObject.getType(), localizedName, localizedDescription, foundDataObject.getId());
            }
        }

        return dataObject;
    }
}
